A dust removal and noise reduction device for cultural relic protection engineering

Abstract

The utility model discloses a kind of dust removal noise reduction devices for cultural relic protection engineering, including box;Air inlet is set on the outer wall of box;Suction pressure subassembly is set on the inner wall of box, is connected with air inlet;Dust removal subassembly is set on suction pressure subassembly side, dust removal subassembly includes the first filter unit, electrostatic adsorption unit, second filter unit communicated in turn, first filter unit is connected with suction pressure subassembly;Air outlet is set on the outer wall of box, is connected with second filter unit;Noise reduction structure is set on the inner wall of box, and noise reduction structure includes sound insulation layer, resonance cavity and sound-absorbing layer, can realize multi-stage filtration intercept different particle size particles, composite noise reduction covers full-frequency noise, three-stage dust removal of first filtration, electrostatic adsorption, filtration again and sound insulation-resonance-sound-absorbing triple composite noise reduction are integrated in same box, solve the contradiction of compactness and purification precision, to meet the dual needs of cultural relic protection scene to space compactness and purification precision.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal and noise reduction devices, and in particular to a dust removal and noise reduction device for cultural relic protection projects. Background Technology

[0002] In cultural relic conservation projects, dust particles adhere to the surface of artifacts, causing irreversible damage such as corrosion and fading of paint. Simultaneously, environmental noise (such as visitor flow and equipment operation) can affect the stability of artifacts, particularly posing a significant threat to sensitive materials like paper and lacquered wood. Current dust removal equipment often employs a single filtration structure, resulting in low dust filtration efficiency and a lack of active dust collection capabilities targeting artifact surfaces. Noise reduction devices are mostly single-layer sound insulation structures, leading to insufficient noise reduction. Limited by cost control (e.g., museums have limited equipment budgets, and single-layer structures reduce initial investment) and space constraints (e.g., the limited space around artifact display cases makes it difficult to accommodate multi-layer structures), this results in insufficient blocking of low- and mid-frequency noise, failing to meet the low-noise environment requirements for cultural relic conservation. Furthermore, traditional equipment generally suffers from limited functionality, low integration, and inconvenient maintenance, making it difficult to meet the high-precision environmental requirements of cultural relic conservation. Utility Model Content

[0003] The purpose of this invention is to solve the technical problem of achieving efficient dust removal and noise reduction in the compact space of cultural relic protection scenarios, and to propose a dust removal and noise reduction device for cultural relic protection projects.

[0004] The technical problem of this utility model is solved by the following technical solution:

[0005] A dust removal and noise reduction device for cultural relic protection projects includes:

[0006] Box;

[0007] The air inlet is located on the outer wall of the casing.

[0008] A suction and pressure assembly is disposed on the inner wall of the box and connected to the air inlet;

[0009] A dust removal component is disposed on one side of the suction component. The dust removal component includes a first filter unit, an electrostatic adsorption unit, and a second filter unit connected in sequence. The first filter unit is connected to the suction component.

[0010] An air outlet is located on the outer wall of the housing and is connected to the second filter unit;

[0011] A noise reduction structure is disposed on the inner wall of the enclosure, and the noise reduction structure includes a sound insulation layer, a resonant cavity, and a sound absorption layer.

[0012] In some embodiments, the following technical features are also included:

[0013] The dust removal assembly further includes a dust removal housing, in which the first filter unit, the electrostatic adsorption unit, and the second filter unit are all disposed. The electrostatic adsorption unit includes an electrostatic frame fixedly connected to the dust removal housing. One side of the electrostatic frame is connected to the first filter unit, and the other side of the electrostatic frame is connected to the second filter unit. A positive electrode plate and a negative electrode plate are disposed within the electrostatic frame to form a directional electric field perpendicular to the airflow direction. A grounding plate is disposed between the positive electrode plate and the negative electrode plate, and a dust collection plate extending out of the electric field coverage area is disposed on the surface of the grounding plate.

[0014] In some embodiments, the following technical features are also included:

[0015] The suction assembly includes a mounting plate fixedly connected to the housing, a motor fixedly mounted on the mounting plate, an impeller on the output shaft of the motor, an output hole on one side of the impeller, an upper side of the impeller connected to the air inlet, and the output hole connected to the dust collection housing.

[0016] In some embodiments, the following technical features are also included:

[0017] The electrostatic adsorption unit is equipped with an electrostatic cover, which is detachably connected to the box body.

[0018] In some embodiments, the following technical features are also included:

[0019] The first filter unit is provided with a first filter cover, and the second filter unit is provided with a second filter cover. Both the first filter cover and the second filter cover are detachably connected to the housing.

[0020] In some embodiments, the following technical features are also included:

[0021] The sound-absorbing layer is made of sound-absorbing cotton, and the sound insulation layer is made of double-layered laminated glass.

[0022] In some embodiments, the following technical features are also included:

[0023] The first filter unit is a polyester fiber mesh, and the mesh size of the first filter unit ranges from 80 to 120 mesh.

[0024] In some embodiments, the following technical features are also included:

[0025] The second filter unit is a glass fiber filter paper, and the dust holding capacity of the second filter unit ranges from 500-700 g / m³. 2 .

[0026] In some embodiments, the following technical features are also included:

[0027] The negative electrode plate is electrically connected to the negative electrode of the power supply, and the positive electrode plate is electrically connected to the positive electrode of the power supply. A first groove is formed inside the electrostatic frame, and an electrode plate is provided in the first groove. The width of the first groove matches the width of the electrode plate. The grounding plate is connected to the ground wire.

[0028] In some embodiments, the following technical features are also included:

[0029] The grounding plate is provided with a second groove, the width of which is 1-2mm. A dust collection plate is provided in the second groove, and the dust collection plate is provided with uniformly distributed holes, the diameter of which ranges from 0.3-0.7mm and the spacing between the holes ranges from 0.8-1mm.

[0030] The beneficial effects of this utility model compared with the prior art include:

[0031] This utility model proposes a dust removal and noise reduction device for cultural relic protection projects. The device comprises a housing, an air inlet, a suction assembly, and a dust removal assembly consisting of a first filter unit, an electrostatic adsorption unit, a second filter unit, an air outlet, and a noise reduction structure connected in sequence. It incorporates technical features such as a sound insulation layer, a resonant cavity, and a sound-absorbing layer. This allows for multi-stage filtration to intercept particles of different sizes, and comprehensive noise reduction covering the entire frequency range. By integrating three-stage dust removal (primary filtration, electrostatic adsorption, and secondary filtration) with three-stage noise reduction (sound insulation, resonance, and sound absorption) into a single housing, it resolves the conflict between compactness and purification precision, thus meeting the dual requirements of space compactness and purification precision in cultural relic protection scenarios.

[0032] In addition, some embodiments also have the following beneficial effects:

[0033] Through a multi-stage filtration structure, the first filtration unit (polyester fiber mesh, 80-120 mesh) effectively intercepts large particles with a diameter ≥10μm. The positive and negative plates of the electrostatic adsorption unit form a directional electric field perpendicular to the airflow direction, effectively adsorbing tiny particles of 5-10μm. The second filtration unit (glass fiber filter paper) finely purifies micro-dust with a diameter ≤5μm, achieving a filtration efficiency of ≥99.97% for PM0.3; the glass fiber filter paper has a dust holding capacity of 500-700g / m³. 2 Its service life is more than 30% longer than that of traditional filters. It can effectively remove dust of different particle sizes and ensure clean air around cultural relics. The dust collection component generates negative pressure through the motor to flexibly clean dust on the surface of cultural relics and avoid dust adhesion that may damage the cultural relics.

[0034] Through a composite noise reduction structure, sound insulation layer reflection, resonant cavity dissipation, and sound-absorbing cotton absorption of sound wave energy, multiple methods work together to effectively treat noise of different frequencies, reduce the impact of external noise on cultural relics, and create a quiet protective environment.

[0035] The first filter cover, the electrostatic cover, and the second filter cover are all detachable, and each component can be disassembled independently, improving maintenance efficiency.

[0036] Other beneficial effects of the embodiments of this utility model will be further described below. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a dust removal and noise reduction device for cultural relic protection engineering in an embodiment of this utility model;

[0038] Figure 2 This is a cross-sectional view of a dust removal and noise reduction device for cultural relic protection engineering in an embodiment of this utility model;

[0039] Figure 3 This is a schematic diagram of the electrostatic adsorption unit in an embodiment of the present invention;

[0040] The reference numerals in the accompanying drawings of the instruction manual include: 1. Housing; 11. Sound insulation layer; 12. Resonance cavity; 13. Sound absorption layer; 2. Dust removal assembly; 21. First filter unit; 22. Electrostatic adsorption unit; 221. Positive electrode plate; 222. Negative electrode plate; 223. Grounding plate; 224. Dust collection plate; 225. Electrostatic frame; 23. Second filter unit; 24. Dust removal housing; 3. Suction assembly; 31. Motor; 32. Impeller; 33. Mounting plate; 34. Output hole; 4. Air inlet; 5. Air outlet; 6. First filter cover; 7. Electrostatic cover; 8. Second filter cover. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0042] It should be noted that when a component is said to be "fixed to" another component, it can be directly or indirectly attached to that other component. When a component is said to be "connected to" another component, it can be directly or indirectly connected to that other component. Furthermore, a connection can be used for fixing, coupling, or communication.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "multi-level" means two or more, unless otherwise explicitly specified.

[0045] This utility model embodiment provides a dust removal and noise reduction device for cultural relic protection projects, such as... Figure 1-3 As shown, the assembly includes: a housing, an air inlet, a suction assembly, a dust removal assembly, an air outlet, and a noise reduction structure. The air inlet is located on the outer wall of the housing; the suction assembly is located on the inner wall of the housing and connected to the air inlet; the dust removal assembly is located on one side of the suction assembly and includes a first filter unit, an electrostatic adsorption unit, and a second filter unit connected in sequence, with the first filter unit connected to the suction assembly; the air outlet is located on the outer wall of the housing and connected to the second filter unit; the noise reduction structure is located on the inner wall of the housing and includes a sound insulation layer, a resonant cavity, and a sound-absorbing layer. The dust removal assembly also includes a dust removal housing, with the first filter unit, the electrostatic adsorption unit, and the second filter unit all located inside the dust removal housing; the electrostatic adsorption unit includes an electrostatic frame fixedly connected to the dust removal housing, with one side of the electrostatic frame connected to the first filter unit and the other side connected to the second filter unit; a positive electrode plate and a negative electrode plate are arranged inside the electrostatic frame to form a directional electric field perpendicular to the airflow direction; a grounding plate is arranged between the positive and negative electrode plates, and a dust collection plate extending out of the electric field coverage area is arranged on the surface of the grounding plate. The suction assembly includes a mounting plate fixedly connected to the housing, on which a motor is fixed. An impeller is mounted on the motor's output shaft, with an output hole on one side of the impeller. The upper side of the impeller connects to the air inlet, and the output hole connects to the dust collector housing. The electrostatic adsorption unit has an electrostatic cover, which is detachably connected to the housing. The first filtration unit has a first filter cover, and the second filtration unit has a second filter cover; both the first and second filter covers are detachably connected to the housing. The sound-absorbing layer uses sound-absorbing cotton, and the sound insulation layer uses double-layered laminated glass.

[0046] Preferably, the first filter unit is a polyester fiber mesh, and the mesh size of the first filter unit ranges from 80 to 120 mesh. The second filter unit is glass fiber filter paper, and the dust holding capacity of the second filter unit ranges from 500 to 700 g / m³. 2The negative electrode plate is electrically connected to the negative electrode of the power supply, and the positive electrode plate is electrically connected to the positive electrode of the power supply. A first groove is formed within the electrostatic frame, and an electrode plate is installed in the first groove. The width of the first groove matches the width of the electrode plate. The grounding plate is connected to the ground wire. A second groove is provided on the grounding plate. The width of the second groove is 1-2 mm. A dust collection plate is installed in the second groove. The dust collection plate has uniformly distributed holes with a diameter ranging from 0.3-0.7 mm and a spacing ranging from 0.8-1 mm.

[0047] Example 1

[0048] refer to Figure 1-3 This embodiment provides a dust removal and noise reduction device for cultural relic protection projects, including a housing 1. A suction assembly 3 is provided on the inner wall of the housing 1. A dust removal assembly 2 is provided on one side of the suction assembly 3. The dust removal assembly 2 includes a dust removal box 24. A first filter unit 21 is provided inside the dust removal box 24. An electrostatic adsorption unit 22 is provided on one side of the first filter unit 21. A second filter unit 23 is provided on one side of the electrostatic adsorption unit 22. An air outlet 5 is provided on one side of the second filter unit 23. The electrostatic adsorption unit 22 includes an electrostatic frame 225 connected to the dust removal box 24. The electrostatic frame 225 contains a positive electrode plate 221 and a negative electrode plate 222 to form a directional electric field perpendicular to the airflow direction. A grounding plate 223 is provided between the positive electrode plate 221 and the negative electrode plate 222. A dust collection plate 224 extending out of the electric field coverage area is provided on the surface of the grounding plate 223. The negative electrode plate 222 is provided on the lower side of the grounding plate 223. One side of the electrostatic frame 225 is connected to the second filter unit 23. A sound insulation layer 11 is provided on the inner wall of the housing 1. A resonant cavity 12 is provided on the inner wall of the sound insulation layer 11. A sound-absorbing layer 13 is provided on the inner side of the resonant cavity 12. The device in this embodiment combines a multi-stage filtration structure. The primary filter intercepts large particles, electrostatically adsorbs small particles, and the high-efficiency filter provides fine purification. It can effectively remove dust of different particle sizes, has high overall filtration efficiency for dust particles, and ensures clean air around cultural relics.

[0049] In a preferred embodiment, the distance between the positive electrode plate 221 and the dust collection plate 224 is 5 mm, the electric field direction is perpendicular to the airflow direction, and the sound-absorbing layer 13 uses a density of 48 kg / m³. 3 Sound-absorbing cotton with a thickness of 50mm and a noise reduction coefficient (NRC) ≥ 0.8 is used. Dust-laden air is drawn in by the suction assembly and passes through the first filter unit (80-120 mesh, pore size approximately 150-180μm) to intercept large dust particles. The air then enters the electrostatic adsorption unit 22 (with a voltage of 10-20kV between the positive and negative plates, forming a high-voltage electric field of 10-20kV / cm). Under the influence of the electric field, the dust particles become charged; positive charges move towards the negative plate, and negative charges move towards the positive plate, adsorbing onto the dust collection plate 224. The remaining micro-dust (particle size ≤ 5μm) is filtered by the second filter unit 23 (dust holding capacity ranges from 500-700g / m³). 2The system captures clean air, which is then discharged from the outlet. The sound insulation layer uses 10mm thick double-layered laminated glass (sound transmission rate STC≥35dB) to block high-frequency noise (≥2000Hz) through reflection. In some embodiments, rock wool board is used instead of double-layered laminated glass for the sound insulation layer.

[0050] The suction assembly 3 includes a mounting plate 33 fixedly connected to the housing 1. A motor 31 is fixed on the mounting plate 33. An impeller 32 is provided on the output shaft of the motor 31. An output hole 34 is provided on one side of the impeller 32. An air inlet 4 is connected to the upper side of the impeller 32. The output hole 34 is connected to the dust collection housing 24.

[0051] The electrostatic adsorption unit 22 is equipped with an electrostatic cover 7, which is detachably connected to the housing 1. The dust collection plate inside the electrostatic adsorption unit 22 is removable for cleaning. Preferably, the electrostatic cover 7 is fixed with bolts for easy maintenance.

[0052] The first filter unit 21 is a polyester fiber mesh with a mesh size ranging from 80 to 120. The first filter unit 21 is equipped with a first filter cover 6, which is detachably connected to the housing 1. Specifically, the polyester fiber filter mesh intercepts large dust particles and is removable for cleaning. Preferably, the first filter cover is fixed with bolts for easy maintenance.

[0053] The second filter unit 23 uses glass fiber filter paper to filter out remaining particles. The second filter unit 23 is equipped with a second filter cover 8, which is detachably connected to the housing 1. Preferably, the second filter cover is bolted for quick replacement.

[0054] The negative electrode plate 222 is electrically connected to the negative electrode of the power supply, and the positive electrode plate 221 is electrically connected to the positive electrode of the power supply. A first groove is opened in the electrostatic frame 225, and an electrode plate is provided in the first groove. The width of the first groove matches the width of the electrode plate. The ground plate 223 is connected to the ground wire.

[0055] A second groove is provided on the ground plate 223, with a width of 1-2 mm. A dust collection plate 224 is installed within the second groove. The dust collection plate 224 has evenly distributed holes, with a hole diameter ranging from 0.3-0.7 mm and a spacing between holes ranging from 0.8-1 mm. Specifically, the dust collection plate is embedded in the groove of the ground plate, and the hole design balances airflow resistance and adsorption efficiency.

[0056] During long-term use, this device requires regular cleaning and maintenance of the dust removal components, with a maintenance cycle of 1-3 months. This includes cleaning the electrostatic unit and filter unit (adjusting according to dust load), and an annual comprehensive overhaul including electrical system verification and frame structure tightening. The specific cleaning and maintenance steps are as follows:

[0057] 1. Power outage and discharge:

[0058] After turning off the main power, let it stand for 10 minutes. Use an insulated tool to short-circuit the positive plate 221, negative plate 222 and grounding plate 223 of the electrostatic adsorption unit 22 to release the residual charge and prevent the risk of electric shock.

[0059] 2. Filter unit maintenance:

[0060] First filtration unit 21: Remove the filter screen and use compressed air of ≤0.4MPa to blow away the accumulated dust in the reverse direction. If the blockage is severe, soak and clean it offline. Replace the filter material of the same specification when the damaged area exceeds 30%.

[0061] Second filter unit 23: Check the air permeability of the filter media. If the pressure difference exceeds 1500Pa, it needs to be cleaned or replaced. Ensure that the sealing ring fits tightly with the mounting groove.

[0062] 3. Cleaning of the electrostatic adsorption unit:

[0063] Disassemble the positive electrode plate 221, negative electrode plate 222 and grounding plate 223 (including dust collection plate 224) inside the electrostatic frame 225 to avoid bumps and deformation.

[0064] Soak in an alkaline cleaning solution (such as diluted caustic soda) at ≤40℃ for 30 minutes to soften the oil stains. Use a soft brush to remove dust between the plates. Do not use metal brushes or acidic solvents.

[0065] Rinse the dust collection plate 224 horizontally with high-pressure water to avoid vertical spraying which could break the tungsten wire. Rinse until there is no slippery feeling and then dry it thoroughly.

[0066] 4. Inspection of key components:

[0067] Check if the tungsten wire is broken (replace if broken to prevent short circuit), test the insulator's sealing performance, repair any deformed plates, and replace if severely deformed.

[0068] Calibrate the connection and seal between the electrostatic frame 225 and the second filter unit 23, and replace the aged sealing ring.

[0069] 5. Reset and test: Reassemble the components according to the airflow direction, confirm that the distance between the positive plate 221 and the negative plate 222 is 5mm, and that the grounding plate 223 is in the correct position; after powering on, monitor the operating status of the high-voltage electric field (10–20kV / cm). A green light indicates normal operation, while a red light indicates that a fault needs to be investigated.

[0070] Operating principle: In a museum exhibition hall or artifact restoration room, fix the box 1 to a corner or equipment rack, with the air inlet 4 facing the dust source, such as an artifact display case or restoration workbench. Connect the motor 31 and electrostatic adsorption unit 22 to a regulated power supply via a power cord to ensure stable voltage between the positive plate 221 and the negative plate 222, and reliably ground the grounding plate 223.

[0071] The motor-driven impeller of the suction assembly generates negative pressure, drawing in dusty air through the inlet. First, it passes through the first filter unit 21 (80-120 mesh) to intercept large particles (≥10μm) such as sand and fiber debris. The remaining dusty air enters the electrostatic adsorption unit 22, where a high-voltage electric field is formed between the positive plate (+10-20kV) and the negative plate (-10-20kV). Dust particles of 5-10μm are polarized and charged in this electric field, moving towards the dust collection plate 224 and being adsorbed under the influence of the electric field force. Unadsorbed micro-dust particles ≤5μm (including PM2.5) enter the second filter unit 23, where they are captured by the micropores (≤0.3μm) of the glass fiber filter paper. Finally, clean air is discharged from the outlet.

[0072] External noise is reflected sequentially through the sound insulation layer 11 (double-layer laminated glass) to produce high-frequency noise (≥2000Hz). The resonant cavity 12 (thickness 5-10cm) dissipates mid-frequency noise (500-2000Hz) energy through the Helmholtz resonance principle (resonant frequency f=c / (2π√(V / (S*L))), where c is the speed of sound, V is the volume of the resonant cavity, S is the area of ​​the opening, and L is the length of the opening). The sound-absorbing layer 13 (centrifugal glass wool) converts sound energy into heat energy through fiber vibration and absorbs low-frequency noise (≤500Hz). The final overall noise reduction is ≥25dB(A).

[0073] When the operating air pressure of the equipment increases by 15%, unscrew the first filter cover 6, the electrostatic cover 7, and the second filter cover 8, and clean the first filter unit 21, clean the dust collection plate 224 (which can be washed or wiped), and replace the second filter unit 23.

[0074] With an air volume of 300m³ 3 Under the condition of / h, this device achieves a dust removal efficiency of 99.5% for 0.3-10μm dust, while the dust removal efficiency of a traditional single filter device (only the second filter unit) is 85%. In an environment with a noise source of 60dB(A), this device can reduce the noise to below 35dB(A), while a traditional single-layer sound insulation device (5mm thick single-layer glass) can only reduce it to 50dB(A), which is significantly better than the existing technology.

[0075] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A dust removal and noise reduction device for cultural relic protection projects, characterized in that, include: Box; The air inlet is located on the outer wall of the casing. A suction and pressure assembly is disposed on the inner wall of the box and connected to the air inlet; A dust removal component is disposed on one side of the suction component. The dust removal component includes a first filter unit, an electrostatic adsorption unit, and a second filter unit connected in sequence. The first filter unit is connected to the suction component. An air outlet is located on the outer wall of the housing and is connected to the second filter unit; A noise reduction structure is disposed on the inner wall of the enclosure, and the noise reduction structure includes a sound insulation layer, a resonant cavity, and a sound absorption layer.

2. The apparatus as claimed in claim 1, characterized in that, The dust removal assembly further includes a dust removal box, in which the first filter unit, the electrostatic adsorption unit, and the second filter unit are all disposed. The electrostatic adsorption unit includes an electrostatic frame fixedly connected to the dust removal box. One side of the electrostatic frame is connected to the first filter unit, and the other side of the electrostatic frame is connected to the second filter unit. A positive electrode plate and a negative electrode plate are disposed within the electrostatic frame to form a directional electric field perpendicular to the airflow direction. A grounding plate is disposed between the positive electrode plate and the negative electrode plate, and a dust collection plate extending out of the electric field coverage area is disposed on the surface of the grounding plate.

3. The apparatus as described in claim 2, characterized in that, The suction assembly includes a mounting plate fixedly connected to the housing, a motor fixedly mounted on the mounting plate, an impeller on the motor output shaft, an output hole on one side of the impeller, an upper side of the impeller connected to the air inlet, and the output hole connected to the dust collector housing.

4. The apparatus as claimed in claim 1, characterized in that, The electrostatic adsorption unit is equipped with an electrostatic cover, which is detachably connected to the box body.

5. The apparatus as claimed in claim 1, characterized in that, The first filter unit is provided with a first filter cover, and the second filter unit is provided with a second filter cover. Both the first filter cover and the second filter cover are detachably connected to the housing.

6. The apparatus as claimed in claim 1, characterized in that, The sound-absorbing layer is made of sound-absorbing cotton, and the sound insulation layer is made of double-layered laminated glass.

7. The apparatus as claimed in claim 1, characterized in that, The first filter unit is a polyester fiber mesh, and the mesh size of the first filter unit ranges from 80 to 120 mesh.

8. The apparatus as claimed in claim 1, characterized in that, The second filter unit is a glass fiber filter paper, and the dust holding capacity of the second filter unit ranges from 500 to 700 g / m².

9. The apparatus as claimed in claim 2, characterized in that, The negative electrode plate is electrically connected to the negative electrode of the power supply, and the positive electrode plate is electrically connected to the positive electrode of the power supply. A first groove is formed inside the electrostatic frame, and an electrode plate is provided in the first groove. The width of the first groove matches the width of the electrode plate. The grounding plate is connected to the ground wire.

10. The apparatus as claimed in claim 2, characterized in that, The grounding plate is provided with a second groove, the width of which is 1-2mm. A dust collection plate is provided in the second groove, and the dust collection plate is provided with uniformly distributed holes, the diameter of which ranges from 0.3-0.7mm and the spacing between the holes ranges from 0.8-1mm.

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